Invention Grant
- Patent Title: Flash detection
- Patent Title (中): 闪光检测
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Application No.: US12001320Application Date: 2007-12-11
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Publication No.: US08218086B2Publication Date: 2012-07-10
- Inventor: Zhicheng Lancelot Wang
- Applicant: Zhicheng Lancelot Wang
- Applicant Address: US GA Duluth
- Assignee: Ericsson Television Inc.
- Current Assignee: Ericsson Television Inc.
- Current Assignee Address: US GA Duluth
- Main IPC: H04N9/77
- IPC: H04N9/77

Abstract:
There is provided a method of pre-processing video data to detect flashes, comprising calculating a normalized difference index value for a Luminance [Y] component of the video data, calculating a normalized difference index value for Chrominance [U and V] components of the video data, calculating a normalized luminance [Y] mean gradient index for the video data, and providing an indication that a flash has been detected when all the following conditions are satisfied: the normalized difference index value for the Luminance [Y] component is greater than a first predetermined threshold (TY); the normalized difference index value for the Chrominance [U and V] components is less than a second predetermined threshold (TC); and a difference between the normalized difference index value for the Chrominance [U and V] components and the normalized luminance [Y] mean gradient index is less than or equal to a third pre-determined threshold (TF).
Public/Granted literature
- US20090147142A1 Flash detection Public/Granted day:2009-06-11
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